irregularity of Hamiltonian systems J. Struckmeier, A. Redelbach Physical Review E 74 (2006) 026209/1-026209/12 Energy-second-moment map: A new means for the regularity analysis of Hamiltonian systems (2005) [...] time-dependent Hamilton-Lagrange systems J. Struckmeier, C. Riedel Physical Review E 66 (2002) 066605/1-066605/12 Hamiltonian systems of charged particles in discrete and continuous description Habilitat [...] for time-dependent Hamiltonian systems J. Struckmeier, C. Riedel Physical Review E 64 (2001) 026503/1-026503/9 Invarianten für zeitabhängige Hamilton-Systeme (2001) Analytical approaches for the dynamics